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∠Y is the right angle of the trianlge XYZ. If XY = 2 √6 cm and XZ – YZ = 2cm, then the value of (secX + tanX) is :
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1 √6
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1 2√3
- 2√6
- √6
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Correct Option: D
XY = 2 6 cm
XY – YZ = 2 cm. ...(i)
∴ XZ2 = XY2 + YZ2
⇒ XZ2 - YZ2 = (2√6)2
⇒ XZ2 - YZ2 = 24
∴ | = | |||
XZ - YZ | 2 |
⇒ XZ + YZ = 12 ....(ii)
⇒ secX + tan X = | + | |||
XY | XY |
⇒ secX + tan X = | = | |
XY |
⇒ secX + tan X = | = | = √6 | ||
XY | 2√6 |